In the months following the Spanish-American War, the winds of expansionism blew strongly across the United States. There was a lot of talk about "Manifest Destiny," and many people suggested that America should assume its role as a world power. In Congress, legislators called for the annexation of all Spanish territories. Some newspapers even suggested the annexation of Spain itself. Expansionists such as Roosevelt, former President Harrison, and Captain Mahan argued for creating an American empire. Others, including Grover Cleveland, Andrew Carnegie, and Mark Twain, opposed these ideas.